TS2304: The build process is unable to locate the name 'iterable' within @types

As an experienced dog attempting to master new tricks like npm and TypeScript, I find myself faced with a challenge in my Visual Studio 2017 project. Despite setting it to "Latest" TypeScript 2.5 and adding @types/jquery (3.2.12), the project keeps throwing errors about not being able to locate 'Iterable'. Searching for solutions led me to various resources, such as:

TypeScript error: node_modules/@types/three/three-core.d.ts(767,24): Error TS2304: Cannot find name 'Iterable' https://github.com/DefinitelyTyped/DefinitelyTyped/issues/17239 TS-2304 Error - can not find name 'Iterable' in TypeScript while importing "jquery" in ".ts" file

In my current tsconfig.json file, the following settings are specified:

{
  "compilerOptions": {
    "lib": [
      "dom",
      "es5",
      "es2015.iterable"
    ],
    "target": "es5"
  },
  "exclude": [
    "node_modules"
  ]
}

Despite trying different combinations of libraries and targets, the 'Iterable' error persists. It feels like I've spent more time troubleshooting TypeScript than I would have coding in plain JavaScript. Could this issue be related to .NET Core templates? How can I ensure that the IDE is recognizing my tsconfig.json file as the only one in the project directory? Any guidance on resolving this would be greatly appreciated.

typescriptasp.net-corevisual-studio-2017

Answer №1

I encountered a similar problem and managed to resolve it by adding the include segment to my tsconfig.json file. I am using jQuery version 3.2.1 along with version 3.2.12 of @types/jquery.

{
  "compileOnSave": true,
  "compilerOptions": {
    "lib": [ "dom", "es2015" ],
    "module": "commonjs",
    "sourceMap": true,
    "strict": true,
    "target": "es5"
  },
  "include": [
    "./Scripts/TypeScript/*"
  ],
  "exclude": [
    "node_modules",
    "wwwroot"
  ]
}

Answer №2

If you're encountering this issue, consider using an older version of jQuery and obtaining a version-specific type file to resolve it.

In my case, I needed to work with jQuery 1.10.2, but the default @types/jquery provided was for version 3.2.16. To address this, I downloaded the specific version 1 type by running:

npm install @types/<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="9ef4efebfbece7deafb0e6">[email protected]</a>

Similarly, version-specific types are available for 2.x and 3.x as well.

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